Troubleshooting
Electrical Control System 127
2.3 Outdoor unit malfunction
18~36k
Display Malfunction or Protection
E0 Outdoor EEPROM malfunction
E2
Indoor / outdoor units communication error
E3
Communication malfunction between IPM board and outdoor main board
E4 Open or short circuit of T3 or T4 temperature sensor
E5 Voltage protection of compressor
E6 PFC module protection (For MOU-36HFN1-QRC4,MOU-36HFN1-QRC8)
E8 Outdoor fan speed is out of control
P0 Top temperature protection of compressor
P1 High pressure protection (For 36k models)
P2 Low pressure protection(For 36k models)
P3 Current protection of compressor
P4 Discharge temperature protection of compressor
P5 High temperature protection of condenser
P6 IPM module protection
P7 High temperature protection of evaporator
In low ambient cooling mode, the LED displays“LC” or alternative displays between running frequency
and “LC”(each displays 0.5s)
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